> rule of thumb (Although no written record exists today, this phrase is attributed to an old British law that allowed men to beat their wives with sticks no wi

> rule of thumb (Although no written record exists today, this phrase is attributed to an old British law that allowed men to beat their wives with sticks no wider than their thumb.) This is a myth: https://en.m.wikipedia.org/wiki/Rule_of_thumb https://en.m.wikipedia.org/wiki/Rule_of_thumb